Audemars Piguet’s Royal Oak is without a doubt the brand's most recognizable timepiece. Along with Patek Philippe’s Nautilus model, and the reference 222 by Vacheron Constantin, these Swiss manufacturers sought to respond to the quartz crisis of the 1970s by redefining what a luxury watch can be, setting the world on fire with these creations over the last four decades. Released in 1972, the Royal Oak was the most expensive stainless steel watch ever produced at the time, costing more money to produce than their white gold dress wristwatches due to the difficulty in finishing stainless steel to their exceptional standard.

When first released, the Royal Oak reference 5402 featured the “AP” logo at 6 o’clock, compared with later examples with the “AP” logo positioned at 12 o’clock. Collectors today denote the “series” of the watch by the case number prominently seen on the case back with the earliest models referred to as “A-Series”. The present example from 1975 with case number "B1300” is part of the original “B” series. The watch became known amongst collectors as “Jumbo” due to the 39mm diameter case, which at the time was considered clarge compared to gentlemen’s dress watches of the time, most of which measured between 33 and 35 mm in diameter. The present timepiece is preserved in exceptional and most probably unpolished condition, with incredibly sharp and defined facets which showcase what the model is best known for. The bevels are particularly stunning, with razor-sharp edges. Other correct details include the original non-AP crown and flat deployant clasp. Further adding to the collectibility of these attributes is the presence of the original certificate and presentation box - both being hardly-seen rarities.

Research with the manufacture confirms the production of the present watch in 1975.